Jackup 2 : A deck with legs that can be jacked up or down. During operations, the legs rest on the seabed. When the rig is moved, the legs are retracted, leaving the rig floating. A jackup has Normally no propulsion machinery of its own
Ports and Ships: Port news and Shipping Movements in African and, Glossary of maritime terms, Durban, South Africa 2012. http://ports.co.za/maritime-terms.php, (Mrtm/ Ports and Ships - Brit) {538}